Standard Original IBM POST Error Codes

Posted: May 19, 2009 in OS, trivia
Tags: ,

1 short beep

Normal POST – system is ok
2 short beeps POST Error – error code shown on screen
No beep Power supply or system board problem
Continuous beep Power supply, system board, or keyboard problem
Repeating short beeps Power supply or system board problem
1 long, 1 short beep System board problem
1 long, 2 short beeps Display adapter problem (MDA, CGA)
1 long, 3 short beeps Enhanced  Graphics Adapter (EGA)
3 long beeps 3270 keyboard card
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